SharePoint Search API is helpful to create a client side webpart. You can build a complete search experience without refreshing the page with the responsive client side search result. To build such webpart fist we need to understand how the REST API and its parameter work. The search REST API will always return the jSON file. We can then use the jQuery api to parse the result and show the search result in the way wanted.

Search documents from your team members (peers and manager). For this search you can first find all your team members using my other blog here. Once the team member email addresses are known, those emails can be used as search refiners.